Mountain Bike Won T Shift

I can still move the shift and the cage does move over the top of the two chainrings but the chain itself won t move. Cheers chris fdr over big chain ring. I take apart a trigger shifter and show the most common reason why old shifters won t shift.

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The front derailleur groupo is shimano sis.

Mountain bike won t shift. Pics below showing what s going on but any clues help much appreciated. I am often asked how to fix a bike that won t shift gears or will only shift to some gears. The shifter on your mountain bike has a lever or a control knob that operates the shift cable. However the right handle will only move from 7 to 5 and won t even rotate to gears.

Fdr1 by ccsawyer on flickr fdr4 by ccsawyer on flickr. This applies to both mountain bike trigger shifters as well as road bike sti type shifters. The bike is still ride able and the chain moves okay but the bike is stuck on the number 5 gear. The grip shift won t move no matter how much force is applied.

I walk through the steps to isolate and locate. Hardware is tiagra 9 speed on a cannondale caad8. Just bought a used shockwave sus 550 bike with grip shift shimano gears. Your mtb won t shift through the gears smoothly or at all.

This 2 minute guide is going to explain what s causing your shifting problem and how to fix it. You ve read our guide to starting mtb riding and you ve hit your first problem. I can pull the cable to make the derailleur shift into third but the shifter doesn t have enough throw to do it via the shifter. Loosen the circular adjuster where the cable enters the shifter by hand.

The problem will be the shifters derailleurs or cables. We re here to help you get the most out of your time on the bike whether you re a road rider mountain biker. The front shifter is a shimano integrated brake and shift assembly. Unless the shifter is clearly damaged the problem lies within the unit.

The left handle moves fine although i ve never used it much anyway i usually just leave it on 2. As the 1x drivetrain becomes standard issue on capable cross country trail and enduro bikes we re left with one shifter cable and derailleur to adjust for top to bottom gear range performance. My bike has three gears on the left handle and 7 on the right. The rear derailleur is the heart of most mountain bike drivetrains.

Gears won t shift up or down perfectly with one click. Also the chain skips as one rides despite a recent lube job. What causes shifting problems on mountain bikes.